When determining the user side energy storage capacity, the following aspects need to be considered:

1、Consider load demand: First, understand the size of energy storage capacity that users need. Determine the basic energy storage capacity required by users by analyzing their electricity consumption patterns, load characteristics, and load peak valley differences.

2、Consider load smoothing requirements: User side energy storage systems can be used to smooth loads, reduce peak loads, or fill load valleys. By analyzing the user's load curve and load peak valley difference, determine the smooth demand for user side energy storage capacity.

3、Consider Economy: When determining the user side energy storage capacity, its economy needs to be considered. Determine the optimal energy storage capacity through economic analysis and evaluation of the cost, price differences, and policy support of energy storage systems.

4、Consider backup power supply requirements: The user side energy storage system can serve as a backup power source to provide power supply in the event of grid failure or power outage. Determine the backup power demand for energy storage capacity based on the user's demand for backup power.

5、Consider system planning and optimization: By monitoring and analyzing user electricity consumption data, combined with energy management systems or demand side response technologies, system planning and optimization are carried out to determine energy storage capacity that is suitable for user needs and economy.

6、Consider technical requirements: When determining the user side energy storage capacity, specific technical requirements and feasibility need to be considered. Including considerations of energy storage battery technology, charging and discharging speed, cycle life, safety, and other aspects.

Determining the user side energy storage capacity is a complex process that requires comprehensive consideration of multiple factors such as user needs, economy, technical requirements, and system planning. Therefore, it is recommended to seek professional technical consultation and solution design support when determining the user side energy storage capacity to ensure the selection of the best energy storage capacity. At the same time, the performance of the energy storage system can also be optimized through continuous monitoring and evaluation, and capacity adjustments can be made according to actual conditions.